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在不同的温度条件下,选用不同浓度的酸(盐酸、磷酸)及强氧化剂(KMnO_4)对PPS纤维进行化学处理,并通过表观形态观测和力学性能保持率表征聚苯硫醚(PPS)纤维的化学稳定性。结果表明,室温条件下,经低浓度的盐酸、磷酸及KMnO_4溶液处理后,PPS纤维的断裂强度和断裂伸长率略有增大。在93℃高温条件下,磷酸可改善纤维的力学性能,而KMnO_4溶液使纤维的力学性能下降。此外,表观形态结果表明,相同条件下KMnO_4溶液对PPS纤维的损伤远大于盐酸、磷酸溶液,但纤维的力学性能保持率仍在60%~70%,PPS纤维具有良好的化学稳定性。
The PPS fibers were chemically treated with different concentrations of acid (hydrochloric acid, phosphoric acid) and strong oxidant (KMnO_4) under different temperature conditions. The properties of PPS fibers were characterized by observation of morphology and retention of mechanical properties Chemical stability. The results showed that the breaking strength and elongation at break of PPS fibers increased slightly after treated with low concentrations of hydrochloric acid, phosphoric acid and KMnO 4 solution at room temperature. Under the high temperature of 93 ℃, phosphoric acid can improve the mechanical properties of the fibers, while the KMnO 4 solution decreases the mechanical properties of the fibers. In addition, the morphological results show that under the same conditions KMnO_4 solution of PPS fiber damage is much larger than the hydrochloric acid, phosphoric acid solution, but the mechanical properties of fiber retention is still 60% to 70%, PPS fiber has good chemical stability.